35 At the construction site, 3 m thick clay layer is followed by 4 m thick gravel layer which rest on an impervious rock. A surcharge of 25 kN/m2 is applied at surface. Saturated unit weight of clay is 19 kN/m3 and for gravel is 20 kN/m3. If water table is at ground level, then draw total stress, pore pressure and effective stress diagrams.

35 At the construction site, 3 m thick clay layer is followed by 4 m thick gravel layer which rest on an impervious rock. A surcharge of 25 kN/m2 is applied at surface. Saturated unit weight of clay is 19 kN/m3 and for gravel is 20 kN/m3. If water table is at ground level, then draw total stress, pore pressure and effective stress diagrams.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter11: Ground Improvement

Section: Chapter Questions

Problem 11.10CTP

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(1a) A normally consolidated clay layer is 18 m thick. Natural water content is 45 %, saturated unit weight is 18 kN/m3, grain specific gravity is 2.7 and liquid limit is 63 %. The vertical stress increment at the center of clay layer due to foundation load is 9 kPa. Ground water table is at the surface. Determine the settlement. (1b) Estimate the settlement of a 10 m square area loaded 1 m at 100 kN/ m3 placed 1 m below ground level with ground water at the level of the footing. The static cone resistance values for the sand deposit are as follows: G.L to 6 m = 8000kN/m3,6 -11 mm = 10,000kN/, below 11 m =12,000kN/m3.
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